Power Forum dal uw al kw soluzioni innovative per applicazioni ad alto contenuto tecnologico

Transcription

1 Power Forum 2014 dal uw al kw soluzioni innovative per applicazioni ad alto contenuto tecnologico Maurizio Pogliani Field Application Engineer Linear Technology Corporation Italy Greece - Turkey mpogliani@linear.com Mobile: Copyright 2013 Linear Technology. All rights reserved.

2 2 La nostra mission

3 3 A Worldwide and World Class Analog Design Team 14 Design Centers Worldwide 11 USA Locations China, Germany, Singapore 1181 Employees in Research, Development and Engineering Related Functions Over 270 Analog Design Engineers 664 Granted Patents Worldwide with Numerous Pending Patent Applications

4 4 Products - Regulators (Linear & Switching) - Battery Chargers - PMICs - umodules - LiIon Cell Balancers - Energy Harvesting - LED Drivers - Digital Power Monitoring CMOS Power BCD Power Signal Conditioning Mixed Signal - OpAmps - Comparators - References - LiIon Battery Management - RF Mixers - RF Modulators & Demodulators - WSN ( ) - Data Converters (ADCs and DACs) - Interface - Digital Power Monitoring - Precision Timing - Hot Swap - POE

5 Power solutions quali criticità? In ordine sparso Power efficiency Power dissipation: rendimento, ingombri di scheda e meccanici Complessità di progettazione e test Accuratezza delle tensioni (DC, AC ripple, risposta al gradino) Compatibilità elettromagnetica (rumore, compatibilità ai disturbi) Ambienti ostili (temperature, sollecitazioni meccaniche, disturbi elettromagnetici) Monitoraggio e controllo Sorgenti di tensione disponibili Scelta topologica Battery power systems Battery Lifetime Costi di installazione e manutenzione Connessioni e cablaggi (costi e problematiche) Carica da fonti rinnovabili 5

6 Micromodule 6

7 7

8 8 Voltage Dynamic Scaling

9 PMBus Traditional Power Supply +5% PSM with LTpowerPlay +5% 9 0% TIME POL 1 Voltage Optimization POL 1 Performance Optimized +/- 0.25% +/- 0% 0.25% Vout (Corrected) Power Optimized +/- 0.25% -5% -5% Limited by tolerance % of components. Still subject to time/temp drift POL 2 POL 3 OV/UV/OC Faults with no other system information Dynamic Voltage Control System Monitoring EEPROM POL 2 POL 3 DVFS FPGA/DSP/ASIC 1.50V / 1Ghz 1.15V /.6Ghz Status and Fault Monitoring Power In and Power Out OV/UV/OC Faults Correlate Faults to System Status (Predict Failure) and Black Box Analysis C

10 10

11 11

12 12

13 Quiescent current 13

14 Quiescent current <200uA 14

15 15

16 EMC: Low Noise Switching regulators 16

17 EMC: sviluppo di nuove topologie 17 Zeta topology allowed!

18 18 Automotive Transients 14V Standard for most automotive applications 28V Used in commercial trucks, busses, heavy machinery, military vehicles, airplanes 42V Dead but may be used locally (e.g. electric steering)

19 19 Overvoltage Protection Controllers o 4V to 80V Operation Range o Adjustable Output Clamp Voltage o Overcurrent Protection/Inrush Limiting o Adjustable Fault Timer o Reverse Input Protection up to -60V o Guaranteed -40 C to 125 C (H Grade) Eliminates bulky filtering components by isolating low voltage circuitry from spikes and surges found in automotive, avionics and industrial systems

20 20 High power, high voltage CC/CV controller

21 21 High power, high voltage CC/CV controller

22 22 High power, high voltage CC/CV controller

23 High power buck-boost Multi-chemistry battery charger 23

24 24 Solar panel Battery charger

25 25

26 26 Dal kw al µw Si può fare?

27 27

28 28

29 29 Motivation for Harvesting Energy Energy Harvesting is interesting where o o o o o there is no access to any power source battery use is inconvenient, impractical, expensive or dangerous wiring for power or data transmission is not wanted an autonomous supply can be better for reliability A battery life extension is mandatory or value added requirement Applications Samples: Transportation Predictive Maintenance (rail) Environment Monitoring Industrial Monitoring Control Building Automation Automatic Metering Home automation Wireless Sensor Networks

30 30 Main Ambient Energy Sources There is no universal ambient energy source A comparision of the 4 main ambient energy sources (before conversion) shows each has a different power density. (Source:CEA-Leti)

31 31 Energy Harvesting Sources Change of Magnetic Field by Motion - Induction Courtesy of TOKO Inc. Change of Strain by Motion - Piezoeffect Temperature difference - Thermo electrical cell Light - Photovoltaic Biochemical Energy - Galvanic Process Energy thieves - using EM-fields, other sources

32 32 Basic Considerations for Harvesting Energy Source Transducer Converter Controller Transmitter First think about Your needs Calculate the total energy demand Watch out for peak demands Then think about Your capabilities Consider the source characteristics Watch out for the stability over time And then try to match both Choose the right transducer Match it with the right voltage converter If needed consider an energy storage

33 33 Useful Parts for Harvesting Part Number Description LTC mA boost converter with MPP control, 250mV Startup LTC3108 Ultralow voltage boost converter and system manager, 20mV Startup LTC3109 Auto-polarity version of LTC3108 LTC3588 Ultralow power buck with integrated rectifier and clamp for AC sources LTC3330 Extension of LTC3588 by supply system, battery backup LT3652 2A solar battery charger with power tracking LTC4070 Nanoamp operating current Li-Ion battery charger LTC4071 Nanoamp operating current Li-Ion battery charger with battery disconnect LTC3388 Ultralow power buck LTC3459 Low power booster LTC3129 Low Power buck-boost And possibly more please ask Your local sales for assistance. Energy Sources Lowest Power Lowest Power Lowest Power LT6656 Nanoamp operating current Reference, usable as µpower LDO Lowest Power LTC2935 Nanoamp operating current voltage monitor Lowest Power

34 34 LTC3330: Multi-source Harvester extension with battery backup

35 35 LTC3331: Nanopower Buck-Boost DC/DC with Energy Harvesting Battery Charger

36 36 LTC3107: TEG harvester extension with battery backup